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class="version is-current" href="java-language.html">Next (Pre-release)</a> <a class="version" href="../../4.10.x/languages/java-language.html">4.10.x (LTS)</a> <a class="version" href="../../4.8.x/languages/java-language.html">4.8.x (LTS)</a> <a class="version is-missing" href="../../3.22.x/index.html">3.22.x (LTS)</a> </div> </div> <div class="edit-this-page"><a href="https://github.com/apache/camel/edit/main/docs/components/modules/languages/pages/java-language.adoc">Edit this Page</a></div> </nav> <div class="content"> <article class="doc"> <h1 class="page">Java</h1> <div id="preamble"> <div class="sectionbody"> <div class="paragraph"> <p><strong>Since Camel 4.3</strong></p> </div> <div class="paragraph"> <p>The Java language (uses jOOR library to compile Java code) allows using Java code in your Camel expression, with some limitations.</p> </div> <div class="paragraph"> <p>The jOOR library integrates with the Java compiler and performs runtime compilation of Java code.</p> </div> </div> </div> <div class="sect1"> <h2 id="_java_options"><a class="anchor" href="#_java_options"></a>Java Options</h2> <div class="sectionbody"> <div class="paragraph"> <p>The Java language supports 4 options, which are listed below.</p> </div> <div class="table-wrapper"><table class="tableblock frame-all grid-all stretch"> <colgroup> <col> <col> <col> <col> </colgroup> <thead> <tr> <th class="tableblock halign-left valign-top">Name</th> <th class="tableblock halign-left valign-top">Default</th> <th class="tableblock halign-left valign-top">Java Type</th> <th class="tableblock halign-left valign-top">Description</th> </tr> </thead> <tbody> <tr> <td class="tableblock halign-left valign-top"><div class="content"><div id="_language_option_preCompile" class="paragraph"> <p><a href="#_language_option_preCompile" class="anchor"></a><strong>preCompile</strong> (advanced)</p> </div></div></td> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>true</code></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>Boolean</code></p></td> <td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph"> <p>Whether the expression should be pre compiled once during initialization phase. If this is turned off, then the expression is reloaded and compiled on each evaluation.</p> </div></div></td> </tr> <tr> <td class="tableblock halign-left valign-top"><div class="content"><div id="_language_option_singleQuotes" class="paragraph"> <p><a href="#_language_option_singleQuotes" class="anchor"></a><strong>singleQuotes</strong> (advanced)</p> </div></div></td> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>true</code></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>Boolean</code></p></td> <td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph"> <p>Whether single quotes can be used as replacement for double quotes. This is convenient when you need to work with strings inside strings.</p> </div></div></td> </tr> <tr> <td class="tableblock halign-left valign-top"><div class="content"><div id="_language_option_resultType" class="paragraph"> <p><a href="#_language_option_resultType" class="anchor"></a><strong>resultType</strong> (common)</p> </div></div></td> <td class="tableblock halign-left valign-top"></td> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>String</code></p></td> <td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph"> <p>Sets the class of the result type (type from output).</p> </div></div></td> </tr> <tr> <td class="tableblock halign-left valign-top"><div class="content"><div id="_language_option_trim" class="paragraph"> <p><a href="#_language_option_trim" class="anchor"></a><strong>trim</strong> (advanced)</p> </div></div></td> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>true</code></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>Boolean</code></p></td> <td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph"> <p>Whether to trim the value to remove leading and trailing whitespaces and line breaks.</p> </div></div></td> </tr> </tbody> </table></div> </div> </div> <div class="sect1"> <h2 id="_usage"><a class="anchor" href="#_usage"></a>Usage</h2> <div class="sectionbody"> <div class="sect2"> <h3 id="_variables"><a class="anchor" href="#_variables"></a>Variables</h3> <div class="paragraph"> <p>The Java language allows the following variables to be used in the script:</p> </div> <div class="table-wrapper"><table class="tableblock frame-all grid-all stretch"> <colgroup> <col> <col> <col> </colgroup> <thead> <tr> <th class="tableblock halign-left valign-top">Variable</th> <th class="tableblock halign-left valign-top">Java Type</th> <th class="tableblock halign-left valign-top">Description</th> </tr> </thead> <tbody> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>context</code></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>Context</code></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">The CamelContext</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>exchange</code></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>Exchange</code></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">The Camel Exchange</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>message</code></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>Message</code></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">The Camel message</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>body</code></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock"><code>Object</code></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">The message body</p></td> </tr> </tbody> </table></div> </div> <div class="sect2"> <h3 id="_functions"><a class="anchor" href="#_functions"></a>Functions</h3> <div class="paragraph"> <p>The Java language allows the following functions to be used in the script:</p> </div> <div class="table-wrapper"><table class="tableblock frame-all grid-all stretch"> <colgroup> <col> <col> </colgroup> <thead> <tr> <th class="tableblock halign-left valign-top">Function</th> <th class="tableblock halign-left valign-top">Description</th> </tr> </thead> <tbody> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">bodyAs(type)</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">To convert the body to the given type.</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">headerAs(name, type)</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">To convert the header with the name to the given type.</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">headerAs(name, defaultValue, type)</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">To convert the header with the name to the given type. If no header exists, then use the given default value.</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">exchangePropertyAs(name, type)</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">To convert the exchange property with the name to the given type.</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">exchangePropertyAs(name, defaultValue, type)</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">To convert the exchange property with the name to the given type. If no exchange property exists, then use the given default value.</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">optionalBodyAs(type)</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">To convert the body to the given type, returned wrapped in <code>java.util.Optional</code>.</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">optionalHeaderAs(name, type)</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">To convert the header with the name to the given type, returned wrapped in <code>java.util.Optional</code>.</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock">optionalExchangePropertyAs(name, type)</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">To convert the exchange property with the name to the given type, returned wrapped in <code>java.util.Optional</code>.</p></td> </tr> </tbody> </table></div> <div class="paragraph"> <p>These functions are convenient for getting the message body, header or exchange properties as a specific Java type.</p> </div> <div class="paragraph"> <p>Here we want to get the message body as a <code>com.foo.MyUser</code> type we can do as follows:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">var user = bodyAs(com.foo.MyUser.class);</code></pre> </div> </div> <div class="paragraph"> <p>You can omit <em>.class</em> to make the function a little smaller:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">var user = bodyAs(com.foo.MyUser);</code></pre> </div> </div> <div class="paragraph"> <p>The type must be a fully qualified class type, but that can be inconvenient to type all the time. In such a situation, you can configure an import in the <code>camel-joor.properties</code> file as shown below:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-properties hljs" data-lang="properties">import com.foo.MyUser;</code></pre> </div> </div> <div class="paragraph"> <p>And then the function can be shortened:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">var user = bodyAs(MyUser);</code></pre> </div> </div> </div> <div class="sect2"> <h3 id="_dependency_injection"><a class="anchor" href="#_dependency_injection"></a>Dependency Injection</h3> <div class="paragraph"> <p>The Camel Java language allows dependency injection by referring to beans by their id from the Camel registry. For optimization purposes, then the beans are injected once in the constructor and the scopes are <em>singleton</em>. This requires the injected beans to be <em>thread safe</em> as they will be reused for all processing.</p> </div> <div class="paragraph"> <p>In the Java code you declare the injected beans using the syntax <code>#bean:beanId</code>.</p> </div> <div class="paragraph"> <p>For example, suppose we have the following bean</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">public class MyEchoBean {

     public String echo(String str) {
         return str + str;
     }

     public String greet() {
         return "Hello ";
     }
 }</code></pre> </div> </div> <div class="paragraph"> <p>And this bean is registered with the name <code>myEcho</code> in the Camel registry.</p> </div> <div class="paragraph"> <p>The Java code can then inject this bean directly in the script where the bean is in use:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">from("direct:start")
     .transform().java("'Hello ' + #bean:myEcho.echo(bodyAs(String))")
     .to("mock:result");</code></pre> </div> </div> <div class="paragraph"> <p>Now this code may seem a bit magic, but what happens is that the <code>myEcho</code> bean is injected via a constructor, and then called directly in the script, so it is as fast as possible.</p> </div> <div class="paragraph"> <p>Under the hood, Camel Java generates the following source code compiled once:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">public class JoorScript1 implements org.apache.camel.language.joor.JoorMethod {

     private MyEchoBean myEcho;

     public JoorScript1(CamelContext context) throws Exception {
         myEcho = context.getRegistry().lookupByNameAndType("myEcho", MyEchoBean.class);
     }

     @Override
     public Object evaluate(CamelContext context, Exchange exchange, Message message, Object body, Optional optionalBody) throws Exception {
         return "Hello " + myEcho.echo(bodyAs(exchange, String.class));
     }
 }</code></pre> </div> </div> <div class="paragraph"> <p>You can also store a reference to the bean in a variable which would more resemble how you would code in Java</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">from("direct:start")
     .transform().java("var bean = #bean:myEcho; return 'Hello ' + bean.echo(bodyAs(String))")
     .to("mock:result");</code></pre> </div> </div> <div class="paragraph"> <p>Notice how we declare the bean as if it is a local variable via <code>var bean = #bean:myEcho</code>. When doing this we must use a different name as <code>myEcho</code> is the variable used by the dependency injection. Therefore, we use <em>bean</em> as name in the script.</p> </div> </div> <div class="sect2"> <h3 id="_auto_imports"><a class="anchor" href="#_auto_imports"></a>Auto imports</h3> <div class="paragraph"> <p>The Java language will automatically import from:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">import java.util.*;
 import java.util.concurrent.*;
 import java.util.stream.*;
 import org.apache.camel.*;
 import org.apache.camel.util.*;</code></pre> </div> </div> </div> <div class="sect2"> <h3 id="_configuration_file"><a class="anchor" href="#_configuration_file"></a>Configuration file</h3> <div class="paragraph"> <p>You can configure the jOOR language in the <code>camel-joor.properties</code> file which by default is loaded from the root classpath. You can specify a different location with the <code>configResource</code> option on the Java language.</p> </div> <div class="paragraph"> <p>For example, you can add additional imports in the <code>camel-joor.properties</code> file by adding:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">import com.foo.MyUser;
 import com.bar.*;
 import static com.foo.MyHelper.*;</code></pre> </div> </div> <div class="paragraph"> <p>You can also add aliases (<code>key=value</code>) where an alias will be used as a shorthand replacement in the code.</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-properties hljs" data-lang="properties">echo()=bodyAs(String) + bodyAs(String)</code></pre> </div> </div> <div class="paragraph"> <p>Which allows using <code>echo()</code> in the jOOR language script such as:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">from("direct:hello")
     .transform(java("'Hello ' + echo()"))
     .log("You said ${body}");</code></pre> </div> </div> <div class="paragraph"> <p>The <code>echo()</code> alias will be replaced with its value resulting in a script as:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">.transform(java("'Hello ' + bodyAs(String) + bodyAs(String)"))</code></pre> </div> </div> <div class="paragraph"> <p>You can configure a custom configuration location for the <code>camel-joor.properties</code> file or reference to a bean in the registry:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">JavaLanguage joor = (JavaLanguage) context.resolveLanguage("java");
 java.setConfigResource("ref:MyJoorConfig");</code></pre> </div> </div> <div class="paragraph"> <p>And then register a bean in the registry with id <code>MyJoorConfig</code> that is a String value with the content.</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">String config = "....";
 camelContext.getRegistry().put("MyJoorConfig", config);</code></pre> </div> </div> </div> </div> </div> <div class="sect1"> <h2 id="_example"><a class="anchor" href="#_example"></a>Example</h2> <div class="sectionbody"> <div class="paragraph"> <p>For example, to transform the message using jOOR language to the upper case</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">from("seda:orders")
   .transform().java("message.getBody(String.class).toUpperCase()")
   .to("seda:upper");</code></pre> </div> </div> <div class="paragraph"> <p>And in XML DSL:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-xml hljs" data-lang="xml">&lt;route&gt;
    &lt;from uri="seda:orders"/&gt;
    &lt;transform&gt;
      &lt;java&gt;message.getBody(String.class).toUpperCase()&lt;/joor&gt;
    &lt;/transform&gt;
    &lt;to uri="seda:upper"/&gt;
 &lt;/route&gt;</code></pre> </div> </div> <div class="sect2"> <h3 id="_multi_statements"><a class="anchor" href="#_multi_statements"></a>Multi statements</h3> <div class="paragraph"> <p>It is possible to include multiple statements. The code below shows an example where the <code>user</code> header is retrieved in a first statement. And then, in a second statement we return a value whether the user is <code>null</code> or not.</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">from("seda:orders")
   .transform().java("var user = message.getHeader(\"user\"); return user != null ? \"User: \" + user : \"No user exists\";")
   .to("seda:user");</code></pre> </div> </div> <div class="paragraph"> <p>Notice how we have to quote strings in strings, and that is annoying, so instead we can use single quotes:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">from("seda:orders")
   .transform().java("var user = message.getHeader('user'); return user != null ? 'User: ' + user : 'No user exists';")
   .to("seda:user");</code></pre> </div> </div> </div> <div class="sect2"> <h3 id="_hot_re_load"><a class="anchor" href="#_hot_re_load"></a>Hot re-load</h3> <div class="paragraph"> <p>You can turn off pre-compilation for the Java language and then Camel will recompile the script for each message. You can externalize the code into a resource file, which will be reloaded on each message as shown:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">JavaLanguage java = (JavaLanguage) context.resolveLanguage("java");
 java.setPreCompile(false);

 from("jms:incoming")
     .transform().java("resource:file:src/main/resources/orders.java")
     .to("jms:orders");</code></pre> </div> </div> <div class="paragraph"> <p>Here the Java code is externalized into the file <code>src/main/resources/orders.java</code> which allows you to edit this source file while running the Camel application and try the changes with hot-reloading.</p> </div> <div class="paragraph"> <p>In XML DSL it&#8217;s easier because you can turn off pre-compilation in the <code>&lt;java&gt;</code> XML element:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-xml hljs" data-lang="xml">&lt;route&gt;
     &lt;from uri="jms:incoming"/&gt;
     &lt;transform&gt;
       &lt;java preCompile="false"&gt;resource:file:src/main/resources/orders.java&lt;/java&gt;
     &lt;/transform&gt;
     &lt;to uri="jms:orders"/&gt;
 &lt;/route&gt;</code></pre> </div> </div> </div> <div class="sect2"> <h3 id="_lambda_based_aggregationstrategy"><a class="anchor" href="#_lambda_based_aggregationstrategy"></a>Lambda-based AggregationStrategy</h3> <div class="paragraph"> <p>The Java language has special support for defining an <code>org.apache.camel.AggregationStrategy</code> as a lambda expression. This is useful when using EIP patterns that use aggregation such as the Aggregator, Splitter, Recipient List, Enrich, and others.</p> </div> <div class="paragraph"> <p>To use this, then the Java language script must be in the following syntax:</p> </div> <div class="listingblock"> <div class="content"> <pre>(e1, e2) -&gt; { }</pre> </div> </div> <div class="paragraph"> <p>Where <code>e1</code> and <code>e2</code> are the <em>old</em> Exchange and <em>new</em> Exchange from the <code>aggregate</code> method in the <code>AggregationStrategy</code>. The returned value is used as the aggregated message body, or use <code>null</code> to skip this.</p> </div> <div class="paragraph"> <p>The lambda syntax is representing a Java util <code>BiFunction&lt;Exchange, Exchange, Object&gt;</code> type.</p> </div> <div class="paragraph"> <p>For example, to aggregate message bodies together, we can do this as shown:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">(e1, e2) -&gt; {
   String b1 = e1.getMessage().getBody(String.class);
   String b2 = e2.getMessage().getBody(String.class);
   return b1 + ',' + b2;
 }</code></pre> </div> </div> </div> <div class="sect2"> <h3 id="_limitations"><a class="anchor" href="#_limitations"></a>Limitations</h3> <div class="paragraph"> <p>The Java Camel language is only supported as a block of Java code that gets compiled into a Java class with a single method. The code that you can write is therefore limited to a number of Java statements.</p> </div> <div class="paragraph"> <p>The supported runtime is intended for Java standalone, Spring Boot, Camel Quarkus and other microservices runtimes. It is not supported on any kind of Java Application Server runtime.</p> </div> <div class="paragraph"> <p>Java does not support runtime compilation with Spring Boot using <em>fat jar</em> packaging (<a href="https://github.com/jOOQ/jOOR/issues/69" class="bare">https://github.com/jOOQ/jOOR/issues/69</a>), it works with exploded classpath.</p> </div> </div> </div> </div> <div class="sect1"> <h2 id="_dependencies"><a class="anchor" href="#_dependencies"></a>Dependencies</h2> <div class="sectionbody"> <div class="paragraph"> <p>To use scripting languages in your camel routes, you need to add a dependency on <strong>camel-joor</strong>.</p> </div> <div class="paragraph"> <p>If you use Maven you could add the following to your <code>pom.xml</code>, substituting the version number for the latest and greatest release.</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-xml hljs" data-lang="xml">&lt;dependency&gt;
   &lt;groupId&gt;org.apache.camel&lt;/groupId&gt;
   &lt;artifactId&gt;camel-joor&lt;/artifactId&gt;
   &lt;version&gt;x.x.x&lt;/version&gt;
 &lt;/dependency&gt;</code></pre> </div> </div> </div> </div> <div class="sect1"> <h2 id="_spring_boot_auto_configuration"><a class="anchor" href="#_spring_boot_auto_configuration"></a>Spring Boot Auto-Configuration</h2> <div class="sectionbody"> <div class="paragraph"> <p>When using java with Spring Boot make sure to use the following Maven dependency to have support for auto configuration:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlightjs highlight"><code class="language-xml hljs" data-lang="xml">&lt;dependency&gt;
   &lt;groupId&gt;org.apache.camel.springboot&lt;/groupId&gt;
   &lt;artifactId&gt;camel-joor-starter&lt;/artifactId&gt;
   &lt;version&gt;x.x.x&lt;/version&gt;
   &lt;!-- use the same version as your Camel core version --&gt;
 &lt;/dependency&gt;</code></pre> </div> </div> <div class="paragraph"> <p>The component supports 8 options, which are listed below.</p> </div> <div class="table-wrapper"><table class="tableblock frame-all grid-all stretch"> <colgroup> <col> <col> <col> <col> </colgroup> <thead> <tr> <th class="tableblock halign-left valign-top">Name</th> <th class="tableblock halign-left valign-top">Description</th> <th class="tableblock halign-center valign-top">Default</th> <th class="tableblock halign-left valign-top">Type</th> </tr> </thead> <tbody> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock"><a id="_sb_option_camel_language_java_enabled"></a> <a href="#_sb_option_camel_language_java_enabled" class="anchor"></a><strong>camel.language.java.enabled</strong></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Whether to enable auto configuration of the java language. This is enabled by default.</p></td> <td class="tableblock halign-center valign-top"></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Boolean</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock"><a id="_sb_option_camel_language_java_pre-compile"></a> <a href="#_sb_option_camel_language_java_pre-compile" class="anchor"></a><strong>camel.language.java.pre-compile</strong></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Whether the expression should be pre compiled once during initialization phase. If this is turned off, then the expression is reloaded and compiled on each evaluation.</p></td> <td class="tableblock halign-center valign-top"><p class="tableblock">true</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Boolean</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock"><a id="_sb_option_camel_language_java_single-quotes"></a> <a href="#_sb_option_camel_language_java_single-quotes" class="anchor"></a><strong>camel.language.java.single-quotes</strong></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Whether single quotes can be used as replacement for double quotes. This is convenient when you need to work with strings inside strings.</p></td> <td class="tableblock halign-center valign-top"><p class="tableblock">true</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Boolean</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock"><a id="_sb_option_camel_language_java_trim"></a> <a href="#_sb_option_camel_language_java_trim" class="anchor"></a><strong>camel.language.java.trim</strong></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Whether to trim the value to remove leading and trailing whitespaces and line breaks.</p></td> <td class="tableblock halign-center valign-top"><p class="tableblock">true</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Boolean</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock"><a id="_sb_option_camel_language_joor_enabled"></a> <a href="#_sb_option_camel_language_joor_enabled" class="anchor"></a><strong>camel.language.joor.enabled</strong></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Whether to enable auto configuration of the joor language. This is enabled by default.</p></td> <td class="tableblock halign-center valign-top"></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Boolean</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock"><a id="_sb_option_camel_language_joor_pre-compile"></a> <a href="#_sb_option_camel_language_joor_pre-compile" class="anchor"></a><strong>camel.language.joor.pre-compile</strong></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Whether the expression should be pre compiled once during initialization phase. If this is turned off, then the expression is reloaded and compiled on each evaluation.</p></td> <td class="tableblock halign-center valign-top"><p class="tableblock">true</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Boolean</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock"><a id="_sb_option_camel_language_joor_single-quotes"></a> <a href="#_sb_option_camel_language_joor_single-quotes" class="anchor"></a><strong>camel.language.joor.single-quotes</strong></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Whether single quotes can be used as replacement for double quotes. This is convenient when you need to work with strings inside strings.</p></td> <td class="tableblock halign-center valign-top"><p class="tableblock">true</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Boolean</p></td> </tr> <tr> <td class="tableblock halign-left valign-top"><p class="tableblock"><a id="_sb_option_camel_language_joor_trim"></a> <a href="#_sb_option_camel_language_joor_trim" class="anchor"></a><strong>camel.language.joor.trim</strong></p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Whether to trim the value to remove leading and trailing whitespaces and line breaks.</p></td> <td class="tableblock halign-center valign-top"><p class="tableblock">true</p></td> <td class="tableblock halign-left valign-top"><p class="tableblock">Boolean</p></td> </tr> </tbody> </table></div> </div> </div> </article> <aside class="toc sidebar" aria-label="Table of contents" data-title="Contents" data-levels="2"> <div class="toc-menu"></div> </aside> </div> </main> </div> <div class="footer-tools"> <a href="#top" title="Reach the top of the page">Back to top</a> </div> <footer> <div class="footer"> <figure class="logo"> <img src="../../../_/img/logo-d-a567cee6fa.svg" class="logo-small mt-60" alt="Apache Camel Logo" aria-label="white silhouette of a camel in front of a sand dune"> </figure> <input id="footer-toggle-overview" type="checkbox" title="Show/Hide Overview section"> <dl> <dt><label for="footer-toggle-overview">Overview</label><label for="footer-toggle-overview">&#65291;</label></dt> <dd><a href="../../../blog/">Blog</a></dd> <dd><a href="../../../docs/">Documentation</a></dd> <dd><a href="../../../community/support/">Community</a></dd> <dd><a href="../../../download/">Download</a></dd> </dl> <input id="footer-toggle-documentation" type="checkbox" title="Show/Hide Documentation section"> <dl> <dt><label for="footer-toggle-documentation">Documentation</label><label for="footer-toggle-documentation">&#65291;</label></dt> <dd><a href="../../../manual/">User Manual</a></dd> <dd><a href="../../../components/next/index.html">Components</a></dd> <dd><a href="../../../camel-k/next/">Camel-K</a></dd> <dd><a href="../../../camel-kafka-connector/next/">Camel Kafka Connector</a></dd> <dd><a href="../../../camel-quarkus/next/">Camel Quarkus</a></dd> <dd><a href="../../../camel-spring-boot/next/">Camel Spring Boot</a></dd> <dd><a href="../../../camel-karaf/3.22.x/">Camel Karaf</a></dd> <dd><a href="../../../manual/faq/index.html">FAQ</a></dd> </dl> <input id="footer-toggle-community" type="checkbox" title="Show/Hide Community section"> <dl> <dt><label for="footer-toggle-community">Community</label><label for="footer-toggle-community">&#65291;</label></dt> <dd><a href="../../../community/support/">Support</a></dd> <dd><a href="../../../community/contributing/">Contributing</a></dd> <dd><a href="../../../community/mailing-list/">Mailing Lists</a></dd> <dd><a href="../../../community/user-stories/">User stories</a></dd> <dd><a href="../../../community/articles/">Articles</a></dd> <dd><a href="../../../community/books/">Books</a></dd> <dd><a href="../../../community/team/">Team</a></dd> </dl> <input id="footer-toggle-about" type="checkbox" title="Show/Hide Acknowledgements section"> <dl> <dt><label for="footer-toggle-about">About</label><label for="footer-toggle-about">&#65291;</label></dt> <dd><a href="../../../acknowledgments/">Acknowledgments</a></dd> <dd><a target="_blank" rel="noopener noreferrer nofollow" href="https://www.apache.org/events/current-event.html" title="Apache Events">Apache Events</a></dd> <dd><a target="_blank" rel="noopener noreferrer nofollow" href="https://www.apache.org/licenses/" title="License">License</a></dd> <dd><a target="_blank" rel="noopener noreferrer nofollow" href="https://www.apache.org/security/" title="Security">Security</a></dd> <dd><a target="_blank" rel="noopener noreferrer nofollow" href="https://www.apache.org/foundation/sponsorship.html" title="Sponsorship">Sponsorship</a></dd> <dd><a target="_blank" rel="noopener noreferrer nofollow" href="https://www.apache.org/foundation/thanks.html" title="Thanks">Thanks</a></dd> </dl> <p class="remark"> &copy; 2004-2025 The <a href="https://apache.org">Apache Software Foundation</a>.<br> Apache Camel, Camel, Apache, the Apache feather logo, and the Apache Camel project logo are trademarks of The Apache Software Foundation. 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